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Tuner input circuit

a technology of input circuit and tuner, which is applied in the direction of transmission, high frequency amplifier, television system, etc., can solve the problems of failure of the tuner, broken internal circuit of the tuner, etc., and achieve the effect of small siz

Active Publication Date: 2014-08-26
LG INNOTEK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a tuner input circuit that can be made smaller by combining an LNA and a BPF in one integrated circuit. This allows for a more compact and efficient device.

Problems solved by technology

For example, when high voltage is applied to a device such as a tuner through an antenna due to the ESD, since the ESD voltage is greater than the internal voltage of a circuit device provided in the tuner, the internal circuits of the tuner may be broken, so that the failure of the tuner may be caused.
Since the above devices include capacitors and inductors, the devices may serve as limitation factors in realizing a PCB in micro-size.
Accordingly, the devices may serve as limitation factors in realizing the device in micro-size.

Method used

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Embodiment Construction

[0017]Hereinafter, exemplary embodiments of the disclosure will be described in detail with reference to accompanying drawings. The details of other embodiments are contained in the detailed description and accompanying drawings. The advantages, the features, and schemes of achieving the advantages and features of the disclosure will be apparently comprehended by those skilled in the art based on the embodiments, which are detailed later in detail, together with accompanying drawings. The same reference numerals will be assigned to the same elements throughout the whole description.

[0018]FIG. 2 is a block diagram showing a tuner input circuit according to the embodiment of the disclosure. An integrated circuit 300 according to the embodiment may be formed in the form of a single chip. The integrated circuit 300 may be provided therein with a low noise amplifier (LNA) 340 and a band pass filter (BPF) module 350.

[0019]In addition, a signal received through an antenna may passes throug...

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Abstract

Disclosed is a tuner input circuit. The tuner input circuit includes an integrated including a low noise amplifier and a band pass filter embedded in one chip.

Description

BACKGROUND[0001]1. Field of the Invention[0002]The disclosure relates to a tuner input circuit, and more particularly to a tuner input circuit in which a low noise amplifier (LNA) and a band pass filter (BPF) allowing a broadcast signal received from an antenna to pass therethrough before inputting to a tuner are integrated with each other in one chip, thereby realizing a device in small size.[0003]2. Discussion of the Background[0004]In general, static electricity is collected into a human body or machine to raise the potential difference and then suddenly flows toward a lower potential, which is called an electrostatic discharge (ESD). The ESD is to discharge high voltage of about several kV to several tens of kV for a short time of several μs.[0005]A device affected by the ESD must be equipped with a protective circuit against the ESD so that the device obtains the resistance against the ESD. For example, when high voltage is applied to a device such as a tuner through an antenna...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H04B1/18
CPCH04B1/1638H01L27/0255H03F1/52H03F3/189H03F21/00H04N5/50H03F99/00
Inventor KIM, DO, YUL
Owner LG INNOTEK CO LTD